Clutch.



J. C. OLLARD.

CLUTCH.

APPLICATION FILED FEB. 9, 1915. 1,1 83,223. Patented May 16, 1916.

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J. 0. OLLARD.

CLUTCH.

APPLICATION FILED FEB- 9. 1915.

Patented May16,1916.

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JAMES C. OLIJARD, OF TACOMA, WASHING-TON.

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1 3 2 3 Specification of Letters Patent. Patented llllaty 16, 19916:,

Application filed. Februaryfl, 1915. Serial No. 7,200.

To aZZ whom it may concern Be it known that 1, JAMES C. OLLARD, a

and a step bearing 3 is formed on the said bearing 2, as shown inFig. 1. The end of citizen of the United States, residing at thewinch-shaft 4 is mounted in the step- Tacoma, in the county of Pierce,Washington, have invented certain new and useful Improvements inClutches, of which the following is a specification.

This invention relates to friction clutches whereby a shaft may beconnected to or disconnected from a rotating shaft without stopping thesaid rotating shaft, and especially to such a clutch as is adapted foruse when the two said shafts are at right-angles to each other.

The objects of the invention are to improve the construction whereby theclutch may be filled with oil to reduce its wear; whereby it may beadjusted for wear; it will grip easily and gradually, if desired; itwill be very sensitive to the controlling lever; it will be practicallywithout slip when in its gripping position; and whereby the driven shaftis not moved axially or transversely by the motion in the clutch. Iattain these and other objects by the devices,

- mechanisms and arrangements illustrated by the accompanying drawings,in which- Figure 1 is a longitudinal section of the clutch in grippingposition; Fig. 2 is a, similar view when in its released position; Fig.3 is an end elevation of one piece of the clutch drum; Fig. 4 is a frontelevation of the complete clutch from the line lt in Fig. 2; Fig. 5 is asection of the clutch drum, showing one-half of the clutch drum removed,the interior mechanism being also removed therefrom; Fig. 6 is a rearelevation of the friction disk; and Fig. 7 is aside elevation of thecomplete clutch showing, however, a portion of the drum broken away toreveal the interior mechanism.

Similar numerals of reference refer to similar parts throughout theseveral views.

This device is especially designed for connecting the main engine shaftof a gasolene or other power fishingboat withthe shaft for driving'thedeck-winch thereof, but may of course be applied to other uses to whichit may be adapted.

The shaft 1 is direct connected to the power engine and leads therefromthrough the hereinafter describedclutch to the propeller shaft clutch(not shown) which may preferably be of the usual positive tooth type.The shaft 1 passes through a bearing 2, suitably supported on the boatframe,

State of bearing 3 and has a suitable bevel gear 5 secured thereon. Thepinion 6 is loosely mounted on the shaft 1, being free to turnrelatlvely thereto and also has a very slight axial motion thereon. Thepinion 6 is provided with a boss extension 7 and a disk 8 is formed onthe end of the said boss 7. The friction of the rotating grippingmembers of the clutch on the two surfaces of the said disk 8 causes thepinion 6 to rotate at a speed determined by the difierence between thesaid driving friction and the resistance of the winch shaft 4.

The clutch mechanism is mounted within a drum which consists of threepieces. Two of these pieces 9 (Fig. 3) are complementary and, whenfastened together by the bolts 10, form a hollow chamber throughthe-rear wall of which the boss 7 extends and the flange of whichsurrounds the disk 8. The other member of the drum is the end disk 11which fits within the flange formed on the parts 9 and which closes thesaid chamber formed thereby. The disk 11 is provided with a boss 12securely fastened to the shaft 1 by a suitable key. The disk 11 issecured to the parts 9 by means of screws 13. The parts 9 have lugs 14extending inward (Fig. 3) and the piece 11 has corresponding abuttinglugs 15 (Fig. 5). The

vided with two friction blocks 16 (Fig. 3).

of hard wood firmly secured therein, said blocks being positioned so asto engage the rearward side of the said disk '8 of the pinion. The enddisk 11 is provided with three holes therethrough, and its boss 12 hascorrespondingly positioned lugs or ears 17 formed thereon, in which thetransmitting lever may, be fulcrumed.

The friction disk 18 (Fig. 6) is free to slide on theshaft 1 and fits inthe clutch drum, having notches 19 in its edge into which the said lugs15 fit, so that the said disk 18 must rotate with the clutch and theshaft 1. A plurality of springs 20 are mounted .on the pins 21 extendingfrom the parts 9. These springs engage the surface of said friction disk18 so that the said disk is always pushed by said springs toward thedisk 11 and away from the front surface of the pinion disl, 8. Thefriction surface of the said disk 18 comprises three blocks 22 of hardwood suitably secured in its rear face and positioned so as to I engagethe front face of the said disk 8 when it is forced thereagainst.

The operating mechanism consists of a forked'lever 23, pivoted to theboat at 24, a and having pins 25 engagin a collar 26 surrounding asleeve mounted. on the shaft 1. This sleeve 27 is mounted on the shaft 1in such a way as to rotate therewith and yet, so as to be free to moveaxially thereon in the usual way. The collar 26 engages between twoflanges 28 on the sleeve 27 so that any motion of the lever 23 about,its pivot 24 will cause a 'corresponding'motion of the sleeve 27 alongthe shaft 1. The sleeve 27 has three lugs or ears 29 formed thereon,said ears being positioned so as to correspond with the holes throughthe disk 11 and with the ears 17. Three transmitting bell-crank levers30 are fulcrumed between the ears 17, and the actuating ends -of saidlevers 30 extend forward toward the sleeve 27. Short links 31 connectthe said ends of the said levers 30 with the corresponding ears 29 onthe sleeve 27 The operating en s of said levers 30 are each providedwith a screw pin 32, provided with a suitable locking nut 33, andextending through the above mentioned holes in the disk 11 and eachhaving a suitable head 34 engaging the front side of the above describedfriction disk 18. The position of the said disk 18 along the, shaft maytherefore be adjusted relatively to the sleeve 27 to take up any wearbetween the parts 16, 8 and 22. This wear is reduced to the least amountby filling the clutch drum with oil which I find will be readilyretained therein if the parts 9 fit easily over the boss 7. The oilreduces the wear and allows the clutching parts to engage each otherwithout shock.

It is evident that any motion of the lever 23 will cause the sleeve 27to move and that this motion will, through the links 31, cause a slightmotion of the three transmitting bell-crank levers 30 about theirfulcrums, thus causing a proportionate motion of the screw pins 82 andthus forcing the disk 18 toward the disk 8, if the said sleeve motion isrearward, or will allow the springs 20 to move the said disk 18 awayfrom the disk 8 when the sleeve motion is toward the front; The parts30, 31 and 27 form a series of toggle connections of great power so thata slight force applied to the sleeve will cause a great force to beapplied to the disk 18. When the sleeve 27 is forced back far enough thedisk 18 engages the disk 8 and moves it slightly into contact'with thedisk 16 and then the said disk 8 is gripped between the two disks 16 andwhy the force applied to. the disk 18 by the said transmitting lever 30and pins 32. This force is controlled by the position of the sleeve 27on the shaft 1. All parts of the clutch, except the disk 8, rotate withthe shaft 1 at all times. When the sleeve 27 is in its extreme workingposition the parts are clamped together so tightly that there is no slipbetween the disk 8 .and the adjoining friction disks.

Having described my invention, what I claim is:

In a'friction clutch, the combination with a rotating shaft; of a bosskeyed thereto; a,

flange extending therefrom and forming a disk 11 concentric with saidshaft; substantially rectangular lugs 15 formed on the inner side ofsaid disk near the periphery thereof; an annular body extending oversaid boss flange and having a rear wall; substantially rectangular lugs14 formed on the inner side of said annular body in positionscorresponding with the similar lugs on the disk and engaging said firstlugs; screw means passing through said first lugs and into said secondlugs whereby the said said boss, one end engaging said movable diskwhereby it may be moved to apply frictional Contact between said drivendisk and the rear wall and the movable disk; and means for operating theother ends of the levers while the shaft is in rotation.

, JAMES C. OLLARD. l/Vitness:

M. F. MCNEIL.

copies of this patent maybe obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D. G."

